From patchwork Tue Sep  7 14:28:06 2010
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Subject: Spec DECL_VISIBILITY_SPECIFIED for whopr partitioning
Date: Tue, 07 Sep 2010 04:28:06 -0000
From: Jan Hubicka <hubicka@ucw.cz>
X-Patchwork-Id: 64025
Message-Id: <20100907142806.GE21528@kam.mff.cuni.cz>
To: gcc-patches@gcc.gnu.org, rguenther@suse.de

Hi,
unless DECL_VISIBILITY_SPECIFIED is set, we ignore visibilities for external symbols
(to make -fvisibility work). 

Setting the flag in WHOPR partitioning makes locally_bound_p and friends to trust
the visibility and improves PIC codegen.

Boostrapped/regtested x86_64-linux, OK?

Honza

	* lto/lto.c (promote_var): Set DECL_VISIBILITY_SPECIFIED.


Index: lto/lto.c
===================================================================
--- lto/lto.c	(revision 163947)
+++ lto/lto.c	(working copy)
@@ -914,6 +914,7 @@ promote_var (struct varpool_node *vnode)
   gcc_assert (flag_wpa);
   TREE_PUBLIC (vnode->decl) = 1;
   DECL_VISIBILITY (vnode->decl) = VISIBILITY_HIDDEN;
+  DECL_VISIBILITY_SPECIFIED (vnode->decl) = true;
   if (cgraph_dump_file)
     fprintf (cgraph_dump_file,
 	    "Promoting var as hidden: %s\n", varpool_node_name (vnode));
@@ -930,6 +931,7 @@ promote_fn (struct cgraph_node *node)
     return false;
   TREE_PUBLIC (node->decl) = 1;
   DECL_VISIBILITY (node->decl) = VISIBILITY_HIDDEN;
+  DECL_VISIBILITY_SPECIFIED (node->decl) = true;
   if (node->same_body)
     {
       struct cgraph_node *alias;
@@ -938,6 +940,7 @@ promote_fn (struct cgraph_node *node)
 	{
 	  TREE_PUBLIC (alias->decl) = 1;
 	  DECL_VISIBILITY (alias->decl) = VISIBILITY_HIDDEN;
+	  DECL_VISIBILITY_SPECIFIED (alias->decl) = true;
 	}
     }
   if (cgraph_dump_file)